Eye on the Prize: Master Physiological Optics with NBEO Practice Test 2026!

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $9.99Unlock all
Session length

1 / 20

If refractive error RE is +2 D and accommodation is +1 D, what is the near point NP in meters?

0.25 m

0.333 m

The near point is the closest distance at which the eye can form a clear image of a near object given its current refractive state and available accommodation. The eye’s total focusing power when viewing near is the sum of its refractive error and the accommodation it can exert. Since 1/NP equals the total optical power, you set 1/NP = RE + A. Therefore NP = 1 / (RE + A).

Here, RE is +2 diopters and accommodation is +1 diopter, so RE + A = 3 D. NP = 1/3 m ≈ 0.333 m.

0.5 m

1.0 m

Next Question
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy